561640613000 has 32 divisors (see below), whose sum is σ = 1314239036760. Its totient is φ = 224656244800.

The previous prime is 561640612993. The next prime is 561640613029. The reversal of 561640613000 is 316046165.

It can be written as a sum of positive squares in 4 ways, for example, as 266154873604 + 295485739396 = 515902^2 + 543586^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280819307 + ... + 280821306.

Almost surely, 2^561640613000 is an apocalyptic number.

561640613000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

561640613000 is an abundant number, since it is smaller than the sum of its proper divisors (752598423760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561640613000 is a wasteful number, since it uses less digits than its factorization.

561640613000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561640634 (or 561640620 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

Adding to 561640613000 its reverse (316046165), we get a palindrome (561956659165).

The spelling of 561640613000 in words is "five hundred sixty-one billion, six hundred forty million, six hundred thirteen thousand".